JPH0722376Y2 - Body rear structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a rear structure of a vehicle body such as an automobile, and more particularly to a rear structure of a vehicle body provided with a reinforcing gusset for suppressing falling vibration of a suspension tower portion. Is.

[Conventional technology]

Conventionally, as a structure showing a structure in which a reinforcing gusset is arranged and fixed to a wheel house inner constituting the suspension tower section in the rear part of a vehicle body of an automobile or the like in order to suppress the collapse vibration of the suspension tower section, the applicant of the present invention Japanese Patent Application No. Sho 63-13278, which is a prior application of the above, is shown in FIGS. 4 and 5.

As shown in FIGS. 4 and 5, the rear floor panel 70 is joined to the wheel house inner 10 that forms the rear suspension tower portion 90, and the rear suspension tower portion 90 is restrained from falling vibration. In addition, a reinforcing gusset 20 extending in the vertical direction is fixed to the vehicle house inner side of the wheel house inner 10.

Further, a rear floor side member 30 having a substantially hat cross section extending in the vehicle front-rear direction is fixed to the lower surface of the rear floor panel 70, and the lower end of the reinforcing gusset 20 is
The rear floor panel 70 penetrates the rear floor panel 70 and is embedded in the rear floor side member 30.
It is fixed to the inner surface of 30.

In the structures shown in FIGS. 4 and 5, the reinforcing gusset 20 is fixed to the inner side of the vehicle of the wheel house inner 10, and the first gusset 210 and the rear floor panel 70 are penetrated into the rear floor side member 30. Second tubular shape fixed by embedding
A structure constructed by joining gussets 220 is shown.

[Problems to be solved by the device]

However, the rear structure of the vehicle body shown in FIGS. 4 and 5 (that is,
In the case of the structure of Japanese Patent Application No. 63-13278), although the collapse vibration of the rear suspension tower section 90 can be suppressed by the reinforcing gusset 20, the rear subframe mounting rigidity against the input from the rear subframe (not shown) is increased. Since it is not a structure that secures enough and also a structure that secures sufficient body rigidity for left and right inputs from a suspension (not shown), it is not possible to improve the rear subframe mounting rigidity and body rigidity. .

Therefore, an object of this invention is to improve the mounting rigidity of the rear subframe by connecting and connecting the reinforcing gusset embedding and fixing portions of the left and right rear floor side members, and at the same time, to the rear wheel house inner and the rear floor side member by the reinforcing gusset. So that the load applied from the suspension to the rear floor side member via the rear sub-frame in the thrust direction and the load applied from the suspension to the wheel house inner in the direction to collapse the suspension tower part are canceled out. , To improve the body rigidity.

[Means for Solving the Problems]

Therefore, in this invention, a reinforcing gusset that suppresses the collapse vibration of the rear suspension tower section is fixed to the side surface on the vehicle inner side of the wheel house inner that constitutes part of the left and right rear suspension tower sections. In the vehicle body rear structure in which the lower end side of the reinforcing gusset is embedded and fixed in the rear floor side member and a cross member and a rear subframe are provided so as to connect the left and right rear floor side members, the left and right rear floors are provided. The cross member is laterally fixed between the reinforcing gusset embedding fixing portions of the side member, and each end of the rear subframe is attached to the lower surface of the reinforcing gusset embedding portion of the left and right rear floor side members. To do.

[Operation] According to the above means, the reinforcing gusset suppresses the collapse vibration of the suspension tower portion,
The load applied from the suspension to the rear floor side member via the rear sub-frame in the thrust direction and the load applied from the suspension to the wheel house wing to cause the suspension tower to fall down cancel each other out. The weight of the vehicle body is reduced without increasing the size, and the input from only the rear subframe side can be transmitted to the wheel house inner via the reinforcing gusset, so the mounting rigidity of the rear subframe is improved. In addition, since the embedded fixing portions of the reinforcing gussets on the left and right rear floor side members can be connected and coupled by the cross member and the rear sub-frame, the body rigidity against the input from the suspension can be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

The drawings from FIG. 1 to FIG. 3 show an embodiment of the present invention. FIG. 1 is a sectional view taken along line I-I of FIG. 3, and FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 and FIG. 3 are plan views seen from III in FIG.

Then, as shown in FIGS. 1 to 3, a closed cross section that extends at a right angle to the vehicle body center line and in the vehicle body vertical direction is provided on the vehicle inner side of the wheel house inner 1 that constitutes the rear suspension tower portion 9. The reinforcing gusset 2 having a high rigidity formed on the rear floor panel 7 is fixed to the lower surface of the rear floor panel 7, and the lower end of the reinforcing gusset 2 is fixed to the lower surface of the rear floor panel 7 to form a closed cross section. It is inserted and embedded in a rear floor side member 3 having a substantially hat cross section that extends in the vehicle front-rear direction, and is fixed to the inner side surface thereof.

In this embodiment, the reinforcing gusset 2 has two members 2 on the wheel house inner 1 side and the rear floor side member 3 side.
Although the structure composed of 1,22 is shown, the structure may be composed of one member.

In the vehicle body rear structure configured as described above, as shown in FIGS. 1 to 3, the embedded fixing portions 4 of the reinforcing gussets 2 on the left and right rear floor side members 3 are connected and coupled by the cross member 5. The embedded fixing portion 4 of the reinforcing gusset 2 is used as the fixing portion of the rear subframe 6.

Specifically, first, between the outer side surfaces of the left and right rear floor side members 3 facing the inner side surface of the rear floor side member 3 which is the embedded fixing portion 4 of the reinforcing gusset 2, the cross member 5 having a substantially hat cross section extending in the vehicle width direction. Is installed horizontally, and its ends are fixed to the outer side surfaces, so that the embedded fixing portions 4 of the reinforcing gussets 2 on the left and right rear floor side members 3 are connected and coupled.

A collar 8 is provided inside the reinforcing gusset 2 that is embedded and fixed in the rear floor side member 3, and a long bolt 81 and a nut 82 that penetrate the collar 8 are provided.
Thus, the end portion of the rear sub-frame 6 extending in the vehicle width direction is suspended and fixed to the lower surface portion 31 of the embedded fixing portion 4 of the reinforcing gusset 2 in the rear floor side member 3, whereby the left and right embedded fixing portions are fixed. The parts 4 are also connected and coupled by the rear subframe 6.

Thus, the rear sub-frame 6 has the embedded fixed portion 4 (the lower surface portion 3) of the reinforcing gusset 2 in the rear floor side member 3.
By being suspended and fixed to 1), the rear sub-frame 6 is also connected to the wheel house inner 1 via the rear floor side member 3 and the reinforcing gusset 2 embedded and fixed in the rear floor side member 3, When an input acts on the rear sub-frame 6, the input from the rear sub-frame 6 is also transmitted to the wheel house inner 1 to which the reinforcing gusset 2 is fixed via the rear floor side member 3 and the reinforcing gusset 2. can do.

Therefore, the mounting rigidity of the rear sub-frame 6 with respect to the input can be sufficiently secured, and the mounting rigidity of the rear sub-frame 6 can be significantly improved.

Further, between the embedded fixing portions 4 of the reinforcing gussets 2 on the left and right rear floor side members 3, a cross member 5 laterally fixed to the embedded fixing portions 4 and a rear portion fixed to the lower surface portion 31 of the embedded fixing portions 4 are provided. Since the sub-frames 6 can be connected and coupled, for example, an input from the suspension, that is, a load applied in a direction of pushing up the rear floor side member 3 from the suspension via the rear sub-frame 6 and a suspension generated at substantially the same time Since the load applied to the wheel house inner in the direction in which the suspension tower portion falls down is offset by each other, sufficient rigidity can be secured.

Therefore, in combination with the improvement in the mounting rigidity of the rear sub-frame 6 described above, the body rigidity, particularly the body rigidity with respect to the left and right inputs from the suspension, can be significantly improved.

It should be noted that the shape and the fixing structure of each member are not limited to the above embodiments, and include various embodiments within the scope of claims for utility model registration.

[Effect of device]

As described above, according to the present invention, the embedded fixing portions of the reinforcing gussets on the left and right rear floor side members are connected and coupled by the cross member, and the rear subframe is attached to the lower surface of the embedded fixing portions. By transmitting the input from the frame to the wheel house inner via the reinforcing gusset, it is possible to cancel the load in the direction in which the suspension tower falls, and to significantly improve the mounting rigidity of the rear subframe, and Together with this, it is possible to significantly improve the body rigidity against input from the suspension.

[Brief description of drawings]

The drawings from FIG. 1 to FIG. 3 show an embodiment of the present invention. FIG. 1 is a sectional view taken along line I-I of FIG. 3, and FIG. 2 is a sectional view taken along line II-II of FIG. Fig. 3 is a plan view taken along line III of Fig. 1, and Figs. 4 and 5 show a conventional example. Fig. 4 is a sectional view taken along line IV-IV of Fig. 5 (Fig. 1). Equivalent sectional view),
FIG. 5 is a schematic perspective view taken along line V of FIG. 1 …… Wheel house inner 2 …… Reinforcement gusset 3 …… Rear floor side member 31 …… Bottom surface 4 …… Embedded fixing part of reinforcement gusset 5 …… Cross member 6 …… Rear subframe

Claims (1)

[Scope of utility model registration request] 1. A reinforcing gusset for restraining falling vibration of the rear suspension tower portion is fixed to a side surface of a wheel house inner, which constitutes a part of each of the left and right rear suspension tower portions, on an inner side of the vehicle. In the vehicle body rear structure in which the lower end side of the reinforcing gusset is embedded and fixed in the rear floor side member, and a cross member and a rear subframe are provided so as to connect the left and right rear floor side members, the left and right rear floors are provided. The cross member is laterally fixed between the reinforcing gusset embedding fixing portions of the side member, and each end of the rear subframe is attached to the lower surface of the reinforcing gusset embedding portion of the left and right rear floor side members. The rear structure of the car body.